CVE-2025-9938 Details
Description
A weakness has been identified in D-Link DI-8400 16.07.26A1. The affected element is the function yyxz_dlink_asp of the file /yyxz.asp. This manipulation of the argument ID causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be exploited.
A stack-based buffer overflow vulnerability has been identified in the D-Link DI-8400 router, specifically in the jhttpd HTTP server running firmware version 16.07.26A1. The vulnerability arises in the yyxz_dlink_asp function, which processes requests to the /yyxz.asp endpoint. Attackers can exploit this vulnerability remotely by sending an overly long string through the id parameter, leading to potential arbitrary code execution, unauthorized control of the device, theft of sensitive information, or causing the device to crash.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Sep 4, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/ZZ2266/.github.io/tree/main/Dlink/DI-8400/yyxz.asp | [email protected] | ExploitThird Party Advisory |
| https://github.com/ZZ2266/.github.io/tree/main/Dlink/DI-8400/yyxz.asp#proof-of-concept-poc | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/?ctiid.322340 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.322340 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.643446 | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.dlink.com/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| dlink di-8400 firmware | 16.07.26a1 |
CPE
Remediation
| |
| dlink di-8400 | a1 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Sep 29, 2025 | Initial Analysis | [email protected] |
| Sep 4, 2025 | New CVE Received | [email protected] |